Stereotype-printing-plate-casting mechanism.



l H. A. W. WOOD.

STBRBOTYPB PRINTING PLATE CASTING MBCHANISM. APPLIGATION FILED Imm, 1902. BBNBWBD rEB.12. 1906.

Patented Nov. 29, 1910.

2 SHEETS-SHEET 1.

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H. A. W. WOOD.

STBRBOTYPE PRINTING PLATE CASTING MECHANISM,

APPLICATION FILED rEBxI, 1902. BBNBWBD PEB. 12. 1906.

977,248. Patented Nov. 29, 1910.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

HENRY A. WISE WOOD, 0F NEW YORK, N. Y., ASSIGNOR TO CAMPBELL PRINTING PRESS & MANUFACTURING COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

STEREOTYPE-PRINTING-PLATE-CASTING MECHANISM.

Application filed February 7, 1902, Serial No. 92,978.

To all whom 'it may concern:

Be it known that I, HENRY A. WISE VOOD, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented a new and useful StereotypePrinting-PlateCasting Mechanism, of which the following is a specification.

In my patent dated Feb. 17, 1903, No. 7 21,117 I have shown, described and claimed an organized mechanism for casting and tinishing curved stereotype printing plates.

The invention or improvements covered by this application for patent relate to an improved or modified form of stereotype printing plate casting mechanism adapted for use in the manner described in said patent or in the other or simpler forms of casting box.

The present invention relates to an improved or modified way of removing the flexible matrix from the surface of the cast plate.

By the present invention, the matrix is made resilient so that it is adapted to be bent to a curved shape in the casting box, and so that it will strip or spring from the surface of the cast plate by its own resiliency when the box is opened after the casting operation.

The parts further are arranged so that the said resilient matrix will be brought back to casting shape and position for the next cast, when the box is again closed.

The preferred way of guiding and manipulating this kind of a matrix consists in providing a holding device in the segmental back, which will hold the resilient matrix in position along its center line, so that its two ends will be free to spring from the surface of the cast plate as the box is opened, and so that the continued movement in opening the box will entirely free the matrix from the surface of the cast plate.

The invention further consists of certain details of construction hereinafter described and more particularly pointed out. in the specific claims.

Enough of a stereotype printing plate casting machine is shown in the accompanyinO' two sheets of drawings to enable one skilled in the art to practice the invention.

Referring to said drawings, and in detail,

Specification of Letters Patent.

Patented Nov. 29, 1910. Renewed February 12, 1906. Serial No. 300,624.

Figure 1 is a cross-sectional view through the casting box, Fig. 2 is a longitudinal sectional view through the casting box, Figs.

8 and 4 are partial views similar to Fig. 1,

showing the parts in different positions to illustrate the operation, Fig. 5 is a side view, Fig. 6 is an end view of the mechanism for holding the resilient matrix in position in the casting box, and Fig. 7 is a plan view of the resilient matrix.

In the drawings, I have shown enough of the mechanism described in said patent modified to practice the present improvement. The details of the gearing and various parts are not described and shown at lengt-h in this case, as they may be substantially the same as described and illustrated in said patent.

Referring to the drawings, and in detail, A designates the framing.

B designates the core or cylinder which is journaled by means of suitable projecting hubs in the frames A. The said cylinder is provided with small grooves b-b, so that the cast plate will have ribs on its inside or concave periphery. An inlet pipe 118 projects in through one hub of the core, and an outlet pipe 119 extends through the other hub of the core so that the plate can be cooled after the casting operation.

C designates the segmental back. The same is provided wit-h guides 0 0 bearing on the frame A, so that said back is capable of a movement toward and away from the core B.

E designates an end rim carried by the frame A, which stops oif the right-hand end of the casting chamber.

E designates a similar rim arranged to stop off the left-hand end of the casting chamber. These rims are arranged as described in said patent, and the left-hand rim E is preferably sli htly eased oft' of the end of the cast plate a-ter the casting operation by the mechanism described, so that the plate can be easily delivered from the chamber, as hereinafter described.

P designates the cast plate.

f designates the resilient matrix, which is made as hereinafter described. This matrix may be provided with holes f-f near its two edges.

Z designates a conveyer having a tooth z.

This conveyor is arranged in a frame 128, j

and is actuated by suitable mechanism 'to reciprocate and to move the finished plateaway from the top of the core.

24 designates a spo-ut by which .molten metal is dlrected into the casting cavity.

26 designates a power shaft which carries suitable tight and loose pulleys 27 and 28, by which power is applied to the niachii'ie. Arranged en the shaft 20 is a worm 20 Which meshes With a worinwheel 200 mounted on a shaft 30.

3l designates the shaft which is arranged to operate the casting mechanism. 0n the end of this shaft is arranged one member E32 of a clutch. The other member 820 of this clutch is keyed on the end of the shaft 30, and suitable mechanism is provided so that this clutch member can be moved back and forth to engage or disengage from the mem ber 32, so that the casting mechanism can be thrown into and out of operation. irranged on said shaft 31 is a cam 200, Which bears on a roller 201 carried by the segmental back C.

A stopping-piece 202 for the front side of the casting chamber is piroted on a shaft secured in the main frame. ins 203 limit the motion of this stopping-piece- A spring 204 tends to normally pull the stoppingpiece to the position shown in Figs. 3 and 4.

The back C is provided With a dove-tail groove 205 along its center line. A frame 206 is adapted to slide into this groove. Said frame is provided with projecting bolts 207, on which are arranged nuts 20S. A handle 209 is arranged on the end of this frame.

rIhe matrix used for this apparatus is made resilient or elastic. One Way this kind of matrix can be made is as follows In two quarts of Water, mix about two and onehalf pounds of red gum, commercially so called used in making iiongs. Soak for twenty-four hours; then put in a pot and bring to boiling point. In four quarts of Water, place aboutI sixteen ounces of starch, about twenty-two ounces of china clay and about twenty ounces of flour. Mix these With the gum; boil together With the gum; and use the paste thus formed in making the flong. The flong may consist of tWo or preferably more sheets of hacking paper With four or more sheets of tissue on the face. These parts are secured together by the paste previously described. When a matrix is made in this Way, it is sufficiently elastic for the purposes herein described. This recipe may be varied to suit the particular kind of paper used and the depth of the mold.

Another method of preparing a resilient matrix is to insert strips of iiexible metal, stift paper, or other similarly acting maf dinar-y terial in the matrix along` its curved edges, as indiiaiteit at 2t() in iiig. 7. it this is done, the matrix can he made np in the or way with auch strips embedded therein or tast 'to its inner edges.

'the matrix thusK pre'iarrit and haring the holes '-f punched therein is piaced in the frame 200. This is done bj.' unseren-'ing the nuts 208, stippingl the bolts through the holes and then screwing the nuts on the ends of the bolts. llhe training with the rrsilient matrix is then slid into position in the casting ci'iainber. `iii/*hen the parts of the box are in open position, as shown in hin'. 4, the castingl mechanism is then start.- ed in operation. 'ihc back will more up to i "e to close the box. r this will force wr-'ainst 'the end .rinis .lV-Jil', so t rims will hold and ptsition the re. .nt 1matrix in proper ciisting position when the box is closed. 'the niolten metal is then forced or pour-eil into the casting chamber. Then the plate is sn'iliciently cooled, the back As i, drops from the core. the hack moves away from the core, the be ts 20'@- will more down. through the holes ./"--f in the matrix, leaving the same free, so that the two straight ends thereof will spring a Yay from tl cast plate, as shown in Fig. The continued downward movement of the back will cause the nuts 20S to engage the matrix and entirely remore the saine from the plate, as shonn in Fig. 4, if it has not previously cleared itself. is the back drops down away from the core, the stepping-piece 202 will more to the position shown in Fig. 3. rlhe core is then given a half turn by the mechanism described in my previous patent. T his will deliver the cast plate from the casting chamber. ,itis the hack again rises to ctose the box, the stopping-piece 202 will strike under the edge of the cast plat-e and free the same from the surface of the core, as indicated in dotted lines in Fig. l. The conveyer Z will then more the plate from over the casting niechai'iism for further manipulation.

While the invention is herein shown and described as applied for use in connection With an automatically operating casting mechanism, it is obvious, of course, that the same can be applied and used in connection With any of the simpler forn'is of casting box which are opened and closed by hand. It is also obvious that the bolts 207 can be rigidly secured in the segmental back to serve their purpose when the box is opened. These bolts perform two functions, one, that est guiding the matrix into position before each cast, and the other, that of serving to free it along its center line after each cast.

Other mechanisms may be devised for controlling and guiding the resilient matrix so that the same Will free itself from the surface of the cast plate when the box is opened soV and so that the matrix will be brought to proper casting position for the succeeding cast when the box is closed.

As l believe I am the first to devise a matrix su'lliciently resilient lo frcc itsel'll from a plate when thc casting box is opened, and as I believe I am also the first to provide means for guiding and controlling a resilient matrix, I do not wish to be limited to the details of construction herein shown and described, as I am aware and fully understand that the substance of this present invention can bc worked out and applied to any of the ordinary or improved forms of stereotype printing plate casting box without departing from the scope of my invention as expressed in the claims.

As I use' the term straight ends in referring to the matrix, I mean the ends Q11 and 212 thereof, which ends remain straight and are not curved the. matrix is brought into casting position. On the other hand, the edges 21.8 and 214 are brought to substantially semi-cylindrical shape as the matrix is brought to casting position.

Having thus fully described my invention, what I claim and desire to secure by Letters- Patent of the United States is l. A resilient matrix for casting a plurality of curved stereotype printing plates, which can be bent to curved shape in the casting box, and which will spring from the surface of the cast plates by its own resiliency when the box is opened after each casting operation.

2. A resilient matrix for casting a plurality of curved stereotype printing plates having resilient means embodied therein, whereby the matrix can be bent to curved shape in the casting box, whereby the resilient means will tend to free the matrix from the surface of the cast plate when the box is opened, and whereby the matrix can be restored to curved shape for the next cast.

3. A resilient matrix for casting a plurality of curved stereotype printing plates having resilient means embodied therein along two of its edges, whereby the matrix can be bent to curved shape in the casting box, whereby the same will tend to free itself from the surface of the cast plate when the box is opened, and whereby the same can be restored to curved shape in the casting box for the next cast.

ll. The combination of a stereotype printing plate casting apparatus made up of a core and segmental-back, the annular space between the two forming a curved casting chamber, and a resilient matrix from which a plurality of plates can be cast arranged in said box so as to free itself from the surface of each cast plate when the core and back are separated.

5. The combination of a stereotype printing plate casting apparatus made up of a core and segmental back, the annular space between thc two forn'iing a curved casting chamber, and means for holding a resilient matrix in said chamber so that the same will assume the proper curved shape for casting and so that the same will strip itself by its own resiliency from the surface of the cast plate without disconnection from the holding means when the core and segmental back are separated. Y

G. The combination in a stereotype printing plate casting apparatus, of a core and segmental-back, the annular space between.

the two forming a curved casting chamber', and means for holding a resilient matrix from which a plurality of casts can be made so that as the core and segmental back are separated after each casting operation the matrix will free itself by its own resiliency from the surface of the cast plate and so that the inatrix'will be brought back to casting shape and position for the next cast.

7. The combination in a stereotype printing plate casting apparatus, of a core and segmental back, the annular space between the two forming a curved casting chamber', and means for holding a resilient matrix in position therein so that it will strip itself by its own resiliency at its two straight ends from the surface of the cast plate when the core and back are separated and so that it will be restored to casting position when the chamber is closed.

8. The combination in a stereotype printing plate casting apparatus, of a core and segmental back, the annular space bet-Ween the two forming a curved casting chamber, and means for holding a resilient matrix in position therein along a line intermediate its two straight ends so that said straight yends will be free when the chamber is opened.

9. A stereotype printing plate casting apparatus made up of a core, segmental-backand end rings, and means for holding a resilient matrix in position so that said end rings will bring the matrix to casting shape and so that the matrix will strip from they cast plate by its own resiliency.

l0. A stereotype printing plate casting box made up of a core, segmental-back and end rings, and means for holding a resilient matrix in position in said box so that said rings will bring the resilient matrix to easting position when the box is closed, so that the matrix will strip or unwind by its own resiliency from the surface of the cast plate loosely secured thereto with its straight ends free so that the matrix will free itself at its two straight ends from the surface ot' the east plate and will then be moved bodily away from the surface of the east plate as the box is opened and so that as the box is elosed said end rings will bring the resilient matrix bael'to casting shape.

l2. A stereotype printing plate casting box made up of a core, segmentahbael and end rings, means for moving the segmentalback toward and away from the core to close and open the casting box, a resilient matrix and means carried by the segmental baek for controlling the resilient-matrix so that the same will be positioned by the end rings when the box is elosed and so that said matrix will free itself by its straight ends from the surface of the east plate and move away therefrom with the back.

13. A stereotype printing plate casting box made up of a core, segmental back and end-rings, and a matrix holding device having means for holding a matrix along a line between two straight edges, and means for attachment to the box.

14. A stereotype printing plate Casting box made up of a core, segmental-back and end rings, and a matrix holding device having a matrix along a line between its straight ends.

17. A stereotype printing plate Casting box made up of a core, segmental-back and end rings, a groove eut ,in said back, and a. matrix guiding frame adapted to fit said groove carrying bolts with nuts for control- -ling a resilient matrix.

In testimony whereof I have hereunto set my hand, in the presence of two subscribing witnesses.

J As. H. CRAFT.

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